Manufacturer: Sony   Model: MJ820 & MJ821   Power supply: MJ820 - 5V (4.5 to 8V), MJ821 - 12V to 30V (11 to 31V)   Power consumption: 3W   Encoder input signal: 1V p-p (max 1.2V p-p); impedance 120ohm typical   Communication protocol: Dedicated Fanuc serial interface protocol   I/F input/output circuit: Voltage differential line driver/receiver complies with EIA-422   Number of divisions: 40 to 4000   Max response speed: Varies with frequency, read head and number of divisons   Output cable (connector): Supplied

The MJ820 and MJ821 interpolators are compatible with Sony linear scales SH12, SH52 and SL700/PL101 or any encoder with 1Vp-p output with an impedance of 120 ohms. The serial interface output is a dedicated protocol for FANUC CNCi series.   The units include a facility for automatic compensation of the DC offset, gain and phase difference properties of the input signal. This improves interpolation accuracy particularly important in ensuring smooth and accurate drive performance of the control system. Input and output connectors are supplied as standard.